Ok im sure theres going to be plenty of people saying that they're both crap and a waste of money but the people who are on them or were what are your opinions??
They both offer the similar value for areas if you go for the heavyweight listings in yell but are people actually getting a return for there money??
looking for wc's in your area yell is one of the top in google but the nwc doesn't list, i am getting a new website and having a lot of seo work done just wanted to see if its worth a punt on one of the others??
Dean I advertise on both, NWC is new so they need to to settle anyway the rankings they get will not be true figures to look at what ever people that slate it say, i know this to be true as do the same myself.
yell is a household name, I would ask them for the reach of the amount of people searching within your area, business tend to look on there a lot.
My advert pays for itself or I would not advertise on there, I have one of the top heavyweight spots there.
I am ranked 1 first page google with my website, but every little helps not everyone will click on the top spot anyway so it pays to have more channels there are 11 spaces that are good to fill, so having more is good

hope that helps